Why not teach the Teliban to administer the vaccine, that way they won't kill the workers from the WHO any longer for they would be doing the job instead. I do not know if this idea has been tried but I just thought I'd throw it out there and see what everyone thinks about it. The Teliban are killing the WHO workers because they think they are part of a scheme by the government to spy on them, which is true, but if they were doing the job then the vaccine still could be given out onl=y by them instead.
Better that people get the vaccine for polio rather than not getting it at all.